191 lines
6.2 KiB
Markdown
191 lines
6.2 KiB
Markdown
# Changelog
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All notable changes to this project will be documented in this file.
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## [Unreleased]
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### Added
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- New implementation using the C++ parallel STL (C++17).
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- New implementation using C++20 range factories and `for_each_n`.
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- Compiler options for OpenMP and OpenACC GNU offloading to NVIDIA and AMD.
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- Compiler options for Arm Clang added to OpenMP and Kokkos.
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- Kokkos 3 build system (No code changes made).
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- SYCL build rules for ComputeCpp, DPCPP and HipSYCL.
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- Support for CUDA Managed Memory and Page Fault memory.
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- Added nstream kernel from PRK.
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### Changed
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- Default branch renamed from `master` to `main`.
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- Array size is now a signed integer, which follows best practice.
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- Driver now delays allocating large checking vectors until after computation has finished.
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- Use cl::sycl::id parameters instead of cl::sycl::item.
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- Update local copy of OpenCL C++ header file.
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- Ensure correct SYCL queue constructor with explicit async_handler.
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- Use built in SYCL runtime device discovery.
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- Cray compiler OpenMP flags updated.
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- Clang compiler OpenMP flags corrected for NVIDIA target.
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- Reorder OpenCL objects in class so destructors are called in safe order.
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- Ensure all OpenCL kernels are present in destructor.
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- Normalise sum result by expected value to help false negative errors.
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### Removed
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- Pre-building of kernels in SYCL version to ensure compatibility with SYCL 1.2.1.
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Pre-building kernels is also not required, and shows no overhead as the first iteration is not timed.
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- OpenACC Cray compiler flags.
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- Build support for Kokkos 2.x (No code changes made).
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## [v3.4] - 2019-04-10
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### Added
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- OpenACC flags to build for Power 9, Volta, Skylake and KNL.
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- Kokkos list CLI argument shows some information about which device will be used.
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- OpenMP GNU compiler now uses native target flag.
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- Support CSV output for Triad only running mode.
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- NEC and PGI compiler option for OpenMP version.
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- Option to calculate memory bandwidth in base 2 (MiB/s) rather than base 10 (MB/s).
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### Changed
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- Update SYCL implementation to SYCL 1.2.1 interface.
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- Output formatting of Kokkos implementation.
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- Capitalisation of Kokkos filenames.
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- Updated HIP implementation to new interface.
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- Use parallel loop instead of kernels for OpenACC.
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- OpenMP build for XL compiler uses `-qarch=auto`.
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### Removed
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- Superfluous OpenMP 4.5 map(to:) clauses on kernel target regions.
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- Kokkos namespace not used by default so the API is easier to spot.
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- Manual specification of Kokkos layout (DEVICE) as the Kokkos library sets this by default.
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### Fixed
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- Kokkos now compiles and links separately to fix complication with Kokkos 2.05.00.
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- Kokkos can now instantiate single and double precision.
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- OpenMP 4.5 map and reduction clause order to ensure reduction result copied back.
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- Potential race condition in SYCL code between unloading OpenCL library and device list deconstructor.
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## [v3.3] - 2017-12-04
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### Added
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- Add runtime option to run just the Triad kernel.
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- Add runtime option for CSV output of results.
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- ROCm HC implementation added for AMD GPUs.
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### Changed
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- Renamed project to BabelStream (from GPU-STREAM).
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- Update SYCL Makefile to use ComputeCpp path variables.
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- SYCL exceptions are now fatal, and are propagated to a runtime exception.
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## [v3.2] - 2017-04-06
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### Added
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- Build instructions for RAJA and Kokkos libraries.
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### Changed
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- Use RAJA and Kokkos internal iterator types instead of int.
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- Ensure RAJA pointers do not alias.
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- Align memory to 2MB pages in RAJA and OpenMP.
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- Updated Intel compiler flags for OpenMP, Kokkos and RAJA to ensure streaming stores.
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- CUDA Makefile now uses variables to set compiler and flags.
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- Use static shared memory for dot kernel in CUDA and HIP.
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### Fixed
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- Fix initialisation of b array bug in Kokkos implementation.
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## [v3.1] - 2017-02-25
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### Added
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- Dot kernel HIP implementation.
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### Changed
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- Build system overhauled from CMake to a series of Makefiles.
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### Deprecated
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- Android build instructions.
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## [v3.0] - 2017-01-30
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### Added
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- New Dot kernel added to the 4 standard kernels.
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### Changed
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- All model implementations now initialise and allocate their own arrays rather than copying from a master copy. This allows for better performance on NUMA architectures.
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- Version string definition moved from header to main file.
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- Combined OpenMP 3 and 4.5 implementations.
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- OpenMP 4.5 target implementation uses alloc instead of to.
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- Made SYCL indexing consistent.
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- Update SYCL CMake build to use ComputeCpp CE 0.1.1.
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### Fixed
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- OpenMP deconstructor now only frees GPU memory only on GPU build.
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- SYCL template specializations for float and double.
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## [v2.1] - 2016-10-21
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### Added
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- New HIP version added.
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- Results for v2.0 added.
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- Output of OpenCL kernel build log on failure.
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### Changed
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- Use globally defined scalar value.
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- Change scalar value to stop overflow.
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- Restructure results directory.
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- Change SYCL default work-group size.
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- CMake defaults to Release build.
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### Fixed
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- CUDA device name output string corrected.
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- Out of tree builds.
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## [v2.0] - 2016-06-30
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### Added
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- Implementations in OpenMP 4.5 OpenACC, RAJA, Kokkos and SYCL.
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- Copyright headers to source files.
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- Runtime option variables are printed out.
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- Device selection added to OpenCL and CUDA.
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### Changed
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- Major refactor to include multiple programming models. The change now uses C++ for driver code, with different models plugged in as classes which implement the STREAM kernels.
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- Starting values in the arrays to reduce floating point errors with high iteration counts.
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- Default array size now 2^25.
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- Default to 100 iterations instead of 10.
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- CUDA thread block size set via define rather than hardcoded value.
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- Require CUDA 7 for C++11 support.
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- OpenCL C++ header updated.
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### Fixed
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- Various CMake build fixes.
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- Require at least 2 iterations.
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### Removed
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- Warning message for single precision iterations.
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## [v1.1] - 2016-05-09
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### Added
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- HIP implementation and results.
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- Titan X and Fury X results.
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- Output of array sizes and other information at runtime.
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- Ability to set CUDA block sizes on command line.
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- Android build instructions.
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### Changed
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- Update OpenCL C++ header.
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- Requires CUDA 6.5 or above.
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- OpenCL uses Kernel Functor APIs instead of make_kernel API.
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### Fixed
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- Unsigned integer warnings.
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## [v0.9] - 2015-08-07
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Initial public release of OpenCL and CUDA GPU-STREAM.
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